JPH063440Y2 - Reverberation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reverberation effect device for generating a new performance effect by generating a reverberation sound with an arbitrary time delay by an external synchronizing signal from a rhythm machine or the like in a musical tone signal of an electric guitar or the like. It is a thing.

Conventionally, a manually operated operator has been used to variably set the delay time of the reverberation effect device.

However, the effect set by the manipulator is uniform once it is set until the manipulator is operated again. In addition, even when the operator is manually operated to change the reverberation effect, there is a drawback that the performer needs to be located near the reverberation effect device.

An object of the present invention is to eliminate such drawbacks, and to provide a reverberation effect device in which the reverberation time is accurately set and the reverberation effect can be changed in a programmable manner.

The present invention will be described in detail below.

A reverberation effect apparatus according to the present invention converts an analog signal into a digital signal, stores the digital signal, reads the stored digital signal, and converts the analog signal into an analog signal to delay the input signal. And an external synchronization signal input terminal for inputting a synchronization signal for each rhythm sound.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit block diagram showing an embodiment of a reverberation effect device according to the present invention. In this figure, 1 is an input terminal to which an analog signal such as a musical tone signal to which a reverberation effect is desired is applied. 2 is A for converting the analog signal into a digital signal
/ D converter. A data memory 3 stores and reads the digital data converted by the A / D converter 2. 4 is a D for converting digital data that becomes a reverberation sound signal into an analog signal
/ A converter. Reference numeral 8 is a time information setting device for adding a normal reverberation effect that does not use an external synchronization signal. 9 is a programmable counter that determines the storage start address of the data memory based on the time information generated by the time information setting device 8.
Reference numeral 7 is a voltage controlled oscillator (hereinafter referred to as VCO) for generating a drive clock of the programmable counter 9. The reverberation effect device operates so as to obtain a reverberation signal by operating in accordance with a clock signal generated from the VCO, and the VCO corresponds to a clock signal generator that generates an operation clock. . 10 is an external synchronizing signal input terminal from a rhythm machine or the like. Reference numeral 11 is a reset signal generator that generates a reset pulse for the programmable counter 9 in accordance with the synchronization signal input to the external synchronization signal input terminal 10.

The operation of the reverberation effect device configured as described above will be described. An analog signal such as a tone signal applied to the input terminal 1 is converted into a digital signal via the A / D converter 2,
The digital signal is input to the data memory 3. On the other hand, an arbitrary delay time is set in the time information setting device 8, and the address of the data memory 3 corresponding to the set value is preset in the programmable counter 9 as its initial value. The programmable counter 9 sequentially starts counting operation in accordance with the clock of the VCO 7 from the address of the set value toward the final address of the data memory 3 as shown in FIG. 3A. The data memory 3 performs the write operation subsequent to the read operation at the memory address designated by the address designation of the programmable counter 9. The digital data read by the data memory 3 becomes an analog signal in the D / A converter 4, and is output to the reverberation sound signal output terminal 6 as an analog signal obtained by delaying the input analog signal.

In the digital reverberation effect device that operates as described above, when a synchronizing signal is applied to the external synchronizing signal input terminal 10, as shown in FIG. 3B, the programmable counter 9
Are reset, and the data memory 3 starts read and write operations from the address 0 to the final address.

In this manner, the data memory 3 stores musical tones to be played during the period from the input of the synchronization signal from the rhythm sound source to the input of the synchronization signal to be input later. Then, the programmable counter 9 is reset by the subsequent synchronizing signal, and the data memory 3 writes the musical tone currently being played while reading the musical tone previously written.

Hereinafter, the same operation is repeated each time a new sync signal is input, and a reverberation sound signal output from an external rhythm machine as shown in FIG. A reverberation effect is obtained by electrically or acoustically mixing with the original input analog signal that is output and obtained from the output terminal 5.

In this example, the programmable counter 9 can be replaced with a counter of another type, for example, a binary counter or the like with a slight circuit change.

FIG. 5 shows another embodiment of the present invention. As shown in FIG. 4, even when a synchronizing signal having a period exceeding the maximum delay time to is inputted, it is synchronized with the input signal from the rhythm machine. FIG. 6 is a block diagram of a circuit capable of obtaining the reverberation effect described above. In FIG. 5, the programmable counter 9 sequentially performs the counting operation by the external synchronization signal, and when the next external synchronization signal is not input until the data memory 3 reaches the final address, that is, the maximum delay time to, the programmable counter is Signal Q from 9
_{N + 1} resets the flip-flop 12,
The AND gate 13 is cut off to stop the advance clock of the programmable counter 9, and the flip-flop 12 is set by the subsequent external synchronization signal input, and the programmable counter 9 is reset at the same time. It is possible to obtain a reverberation effect that is synchronized with the external synchronization signal from.

As is apparent from the above description, in the present invention, the reverberation time can be greatly changed easily because the delay, calculation, synchronization, etc. are made in the state of the digital signal, the S / N ratio is good, and the external Since the reverberation effect synchronized with the synchronization signal can be obtained, a high-quality reverberation effect (echo effect, hold effect, etc.) accurately synchronized with the rhythm from the external rhythm machine can be obtained.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between each input signal and output signal according to the embodiment of the present invention. FIG. 3 shows R according to an embodiment of the present invention.
The figure which shows the change of the address of AM. FIG. 4 is a diagram showing a relationship between input signals and output signals according to another embodiment of the present invention. FIG. 5 is a circuit block diagram showing another embodiment of the present invention. 1: Analog signal input terminal to add reverberation effect 2:
A / D converter, 3: data memory, 4: D / A converter,
5: output terminal, 6: reverberant sound signal output terminal, 7: programmable counter driving voltage controlled oscillator, 8: time information setting device, 9: programmable counter, 10: external synchronization signal input terminal, 11: programmable counter reset signal generation Device, 12: RS flip-flop, 1
3; And gate.

Claims (1)

[Scope of utility model registration request] 1. A reverberation effect device having a data memory for storing and reading digital data, which imparts a predetermined delay to input digital data, and an external synchronization signal input terminal for inputting a synchronization signal from the outside, and the reverberation effect device. A clock signal generator for generating an operation clock signal having a constant frequency, and a clock signal obtained from the clock signal generator are counted to obtain a count value corresponding to the cycle of the external synchronization signal input from the input terminal. A reverberation effect device comprising a counter, and the delay time of the added delay is set based on the count value.